Improvement in balanced slide-valves



UNITED STATES PATENT OFFICE.

JOSHUA EVERED, OF MUSKEGON, MICHIGAN, ASSIGNOR TO HIMSELF AND JOSHUA DAVIS, OF SAME PLACE.

IMPROVEMENT IN BALANCED SLIDE-VALVES.

Specification forming part of Letters Patent No. 144,268, datedNovember 4, 1873; application filed September 13, 1873. 1

To all whom it may concern:

Be it known that I, JOSHUA EVERED, of Muskegon, in the county of Muskegon and State of Michigan, have invented a new and useful Improvement in Balanced Slide-Valve, of which the following is a specification:

The invention will first be fully described and then pointed out in the claim.

In the accompanying drawing, Figure 1 is a vertical section of Fig. 3 taken on the line as m. Fig. 2 is an inside view of the sleeve or cover. Fig. 3 is a top view of the valve, showing it with the sleeve or cover off.

Similar letters of reference indicate corresponding parts.

B is the face. G is is fitted a sleeve or cover, F, so that it plays freely but stealntight on the cylinder D packed by ring E. The top surface of this sleeve slides in contact with the under side of the cover of the steam-chest. In the center of the cylinder D is the piston G, which works in the interior cylinder H, and which is in communication with the valve-rod hole, as seen at I. J is the spiral spring beneath the piston G, the purpose of which is to force the piston against the sleeve or cover F, and hold the sleeve up against the steam-chest cover when the valve is not under steam-pressure. By this construction the pressure is so far taken off the face that the valve works with but slight friction, and results in a very material saving of 

